Download or read book Luminescence Emission in a Nanocrystal Doped by a Transition Metal Impurity written by George Jr Chappell and published by . This book was released on 2020 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Properties of Semiconductor Nanocrystals written by S. V. Gaponenko and published by Cambridge University Press. This book was released on 1998-10-28 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the optical properties of low-dimensional semiconductor structures, a hot research area - for graduate students and researchers.
Download or read book Luminescence Thermometry written by Miroslav Dramićanin and published by Woodhead Publishing. This book was released on 2018-04-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescence Thermometry: Methods, Materials, and Applications presents the state-of-the art applications of luminescence thermometry, giving a detailed explanation of luminescence spectroscopic schemes for the read-out of temperature, while also describing the diverse materials that are capable of sensing temperature via luminescence. Chapters cover the fundamentals of temperature, traditional thermometers and their figures of merit, a concise description of optical thermometry methods, luminescence and instrumentation, and an explanation of the ways in which increases in temperature quench luminescence. Additional sections focus on materials utilized for luminescence thermometry and the broad range of applications for luminescence thermometry, including temperature measurement at the nanoscale and the application of multifunctional luminescent materials. - Provides an overview of luminescence thermometry applications, including high-temperature, biomedical, nanoscale and multifunctional - Delves into luminescence thermometry by materials group, including Rare-earth and transition Metal Ion Doped, Semiconductors, Quantum Dots and Organic materials - Gives a concise introduction of the latest methods of temperature measurement, including luminescence spectroscopic schemes and methods of analysis
Download or read book Nano Physics ZnS Nanoparticles written by Dr. S. Rinu Sam and published by CSMFL Publications. This book was released on 2017-10-10 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, the preparation and characterization of materials in the nanometer scale has become challenging in the field of material science. Materials in the micrometer scale mostly exhibit physical properties as same as that of bulk form; however materials in the nanometer scale may exhibit physical properties distinctively different from that of bulk. Semiconducting nanoparticles have attracted widespread attention because of their special optical and electronic properties arising from the quantum confinement of electrons and large surface area. Among the semiconductor materials, Zinc Sulphide (ZnS), shows various luminescence properties such as photoluminescence, electroluminescence and thermoluminescence. Hence, ZnS is a traditional phosphor widely used in flat-panel display, electroluminescence devices, infrared windows, sensors and lasers. When ZnS material is doped with transition or rare earth metal ions, it is possible to modify its physical properties. For doped nanocrstalline semiconductor materials, quantum confinement effects in the energy states also produce unusual optical behaviour. In this book, undoped and some transition metal ions doped ZnS semiconducting nanomaterials were synthesized by microwave-assisted solvothermal method. To prepare the undoped ZnS nanoparticles, zinc acetate and thiourea were used as the precursor materials and ethylene glycol was used as the solvent. The solvothermal method used in this present work is an effective method for preparing metal sulfides under mild conditions, which is a simple, cheaper and convenient method. ZnS materials doped with transition metal ions were also synthesized by the same method. In the present work, ZnS material was doped with manganese, copper, cobalt and indium in four different concentrations. The microwave treated precursor materials, after washing with de-ionised water and acetone and after annealing leads to fine nanocrystalline powder.
Download or read book Emerging Synthesis Techniques for Luminescent Materials written by Tiwari, Ratnesh and published by IGI Global. This book was released on 2018-05-19 with total page 525 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and study of materials is a pivotal component to new discoveries in the various fields of science and technology. By better understanding the components and structures of materials, researchers can increase their applications across different industries. Emerging Synthesis Techniques for Luminescent Materials is a critical scholarly resource that explores the important field of emerging synthesis techniques of luminescent materials and its practical applications. Featuring coverage on a broad range of topics such as electroluminescence, glow curve analysis, and upconversion, this book is geared towards engineers, academics, researchers, students, professionals, and practitioners seeking current research on photoluminescence and the study of rare earth doped phosphors.
Download or read book Silicon Nanocrystals written by Lorenzo Pavesi and published by John Wiley & Sons. This book was released on 2010-02-02 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique collection of knowledge represents a comprehensive treatment of the fundamental and practical consequences of size reduction in silicon crystals. This clearly structured reference introduces readers to the optical, electrical and thermal properties of silicon nanocrystals that arise from their greatly reduced dimensions. It covers their synthesis and characterization from both chemical and physical viewpoints, including ion implantation, colloidal synthesis and vapor deposition methods. A major part of the text is devoted to applications in microelectronics as well as photonics and nanobiotechnology, making this of great interest to the high-tech industry.
Download or read book Rare Earth and Transition Metal Doping of Semiconductor Materials written by Volkmar Dierolf and published by Woodhead Publishing. This book was released on 2016-01-23 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rare Earth and Transition Metal Doping of Semiconductor Material explores traditional semiconductor devices that are based on control of the electron's electric charge. This book looks at the semiconductor materials used for spintronics applications, in particular focusing on wide band-gap semiconductors doped with transition metals and rare earths. These materials are of particular commercial interest because their spin can be controlled at room temperature, a clear opposition to the most previous research on Gallium Arsenide, which allowed for control of spins at supercold temperatures. Part One of the book explains the theory of magnetism in semiconductors, while Part Two covers the growth of semiconductors for spintronics. Finally, Part Three looks at the characterization and properties of semiconductors for spintronics, with Part Four exploring the devices and the future direction of spintronics. - Examines materials which are of commercial interest for producing smaller, faster, and more power-efficient computers and other devices - Analyzes the theory behind magnetism in semiconductors and the growth of semiconductors for spintronics - Details the properties of semiconductors for spintronics
Download or read book Futuristic Materials written by and published by Allied Publishers. This book was released on with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Luminescence Spectroscopy of Er3 Doped Inorganic Nanocrystals written by Fiorenzo Vetrone and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Nanomaterials and Nanotechnology written by P. K. Giri and published by Springer Science & Business Media. This book was released on 2013-03-17 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoscale science and technology have occupied centre stage globally in modern scientific research and discourses in the early twenty first century. The enabling nature of the technology makes it important in modern electronics, computing, materials, healthcare, energy and the environment. This volume contains selected articles presented (as Invited/Oral/Poster presentations) at the 2nd international conference on advanced materials and nanotechnology (ICANN-2011) held recently at the Indian Institute of Technology Guwahati, during Dec 8-10, 2011. The list of topics covered in this proceedings include: Synthesis and self assembly of nanomaterials Nanoscale characterisation Nanophotonics & Nanoelectronics Nanobiotechnology Nanocomposites F Nanomagnetism Nanomaterials for Energy Computational Nanotechnology Commercialization of Nanotechnology The conference was represented by around 400 participants from several countries including delegates invited from USA, Germany, Japan, UK, Taiwan, Italy, Singapore, India etc.
Download or read book Doped Nanopowders written by Witold Łojkowski and published by . This book was released on 2007 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of nanopowders, and their applications in industrial and technological innovation, is an important and growing area of interest in the world of nanotechnology. It is widely recognized that the basic properties of nanopowders are strongly influenced by their shape, size, distribution and surface chemistry.
Download or read book Phosphors Up Conversion Nano Particles Quantum Dots and Their Applications written by Ru-Shi Liu and published by Springer. This book was released on 2016-09-01 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to fundamental information on phosphor and quantum dots. It comprehensively reviews the latest research advances in and applications of fluoride phosphors, oxide phosphors, nitridosilicate phosphors and various quantum dot materials. Phosphors and phosphor-based quantum dot materials have recently gained considerable scientific interest due to their wide range of applications in lighting, displays, medical and telecommunication technologies. This work will be of great interest to researchers and graduate students in materials sciences and chemistry who wish to learn more about the principles, synthesis and analysis of phosphors and quantum dot materials.
Download or read book Nanocrystal Quantum Dots Second Edition written by Victor I. Klimov and published by CRC Press. This book was released on 2010-04-21 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of recent advancements in colloidal nanocrystals and quantum-confined nanostructures, Nanocrystal Quantum Dots is the second edition of Semiconductor and Metal Nanocrystals: Synthesis and Electronic and Optical Properties, originally published in 2003. This new title reflects the book’s altered focus on semiconductor nanocrystals. Gathering contributions from leading researchers, this book contains new chapters on carrier multiplication (generation of multiexcitons by single photons), doping of semiconductor nanocrystals, and applications of nanocrystals in biology. Other updates include: New insights regarding the underlying mechanisms supporting colloidal nanocrystal growth A revised general overview of multiexciton phenomena, including spectral and dynamical signatures of multiexcitons in transient absorption and photoluminescence Analysis of nanocrystal-specific features of multiexciton recombination A review of the status of new field of carrier multiplication Expanded coverage of theory, covering the regime of high-charge densities New results on quantum dots of lead chalcogenides, with a focus studies of carrier multiplication and the latest results regarding Schottky junction solar cells Presents useful examples to illustrate applications of nanocrystals in biological labeling, imaging, and diagnostics The book also includes a review of recent progress made in biological applications of colloidal nanocrystals, as well as a comparative analysis of the advantages and limitations of techniques for preparing biocompatible quantum dots. The authors summarize the latest developments in the synthesis and understanding of magnetically doped semiconductor nanocrystals, and they present a detailed discussion of issues related to the synthesis, magneto-optics, and photoluminescence of doped colloidal nanocrystals as well. A valuable addition to the pantheon of literature in the field of nanoscience, this book presents pioneering research from experts whose work has led to the numerous advances of the past several years.
Download or read book Advanced Rare Earth Based Ceramic Nanomaterials written by Sahar Zinatloo-Ajabshir and published by Elsevier. This book was released on 2022-01-15 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Rare Earth-Based Ceramic Nanomaterials focuses on recent advances related to preparation methods and applications of advanced rare earth-based ceramic nanomaterials. Different approaches for synthesizing rare earth-based ceramic nanomaterials are discussed, along with their advantages and disadvantages for applications in various fields. Sections cover rare earth-based ceramic nanomaterials like ceria and rare earth oxides (R2O3), rare earth vanadates, rare earth titanates, rare earth zirconates, rare earth stannates, rare earth-based tungstates, rare earth-based manganites, ferrites, cobaltites, nickelates, rare earth doped semiconductor nanomaterials, rare earth molybdates, rare earth-based nanocomposites, rare earth-based compounds for solar cells, and laser nanomaterials based on rare-earth compounds. - Reviews the chemistry and processing of rare earth doped ceramic nanomaterials and their characteristics and applications - Covers a broad range of materials, including ceria and rare earth oxides (R2O3), vanadates, titanates, zirconates, stannates, tungstates, manganites, ferrites, cobaltites, nickelates, rare earth doped semiconductor nanomaterials, rare earth molybdates, rare earth-based nanocomposites, rare earth-based compounds for solar cells, and laser nanomaterials based on rare-earth compounds - Includes different approaches to synthesizing each family of rare earth-based ceramic nanomaterials, along with their advantages and disadvantages - Provides green chemistry-based methods for the preparation of advanced rare earth-based ceramic nanomaterials
Download or read book Nanoscience written by P O'Brien and published by Royal Society of Chemistry. This book was released on 2013-12-02 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume will present critical and comphrehensive reviews examining the latest research and developments in nanoscience in accessible articles. Quantum dot synthesis, soft lithography and graphene will feature in the debut volume, along with perspectives on research in China and India.
Download or read book Defect related Luminescence in Nanocrystals written by Heidi Danielle Nelson and published by . This book was released on 2018 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dopants and defects play an important role in the luminescence of semiconductors, from classic bulk phosphors to more recently developed colloidal nanocrystals. This thesis describes several studies on the photophysics of defect-related luminescence in semiconductor nanocrystals, with a particular focus on copper and silver charge-transfer luminescence. The combination of density functional theory (DFT) and spectroscopy can provide deeper insight into the photophysics of these materials and help resolve unanswered questions about their luminescence. In chapter 2, DFT is used to investigate various aspects of the electronic structure and photoluminescence mechanism of copper-doped CdSe nanocrystals, including the copper oxidation state, the origin of the broad luminescence line width, and the excited-state singlet−triplet splitting. These calculations support and expand upon previous experimental results. Chapter 3 extends these experimental and computational studies to silver-doped CdSe nanocrystals. These materials have very similar photoluminescence properties to their copper-doped analogues, but they have significant electronic-structure differences due to inverted bonding between the silver dopant and its neighboring anions. Chapter 4 addresses the similarities between the photoluminescence of copper-doped and copper indium sulfide nanocrystals. DFT calculations demonstrate a significant tendency for the hole to localize in the valence band of copper indium sulfide, which has significant copper character and resembles the copper impurity level in doped nanocrystals. Other dopants and defects can also influence nanocrystal luminescence in different ways. Chapter 5 addresses the effects of slow electron trapping and detrapping on the intensity and dynamics of delayed luminescence in nanocrystals by varying the excitation pulse width. Chapter 6 is an investigation of photoinduced magnetization in manganese-doped CdSe nanocrystals; the formation of excitonic magnetic polarons is studied by continuous-wave and time-resolved magneto-optical spectroscopies. Together, these studies demonstrate a variety of ways that dopants and defects can affect the photoluminescence of semiconductor nanocrystals.
Download or read book Semiconductor Nanostructures written by Dieter Bimberg and published by Springer Science & Business Media. This book was released on 2008-06-03 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reducing the size of a coherently grown semiconductor cluster in all three directions of space to a value below the de Broglie wavelength of a charge carrier leads to complete quantization of the energy levels, density of states, etc. Such “quantum dots” are more similar to giant atoms in a dielectric cage than to classical solids or semiconductors showing a dispersion of energy as a function of wavevector. Their electronic and optical properties depend strongly on their size and shape, i.e. on their geometry. By designing the geometry by controlling the growth of QDs, absolutely novel possibilities for material design leading to novel devices are opened. This multiauthor book written by world-wide recognized leaders of their particular fields and edited by the recipient of the Max-Born Award and Medal 2006 Professor Dieter Bimberg reports on the state of the art of the growing of quantum dots, the theory of self-organised growth, the theory of electronic and excitonic states, optical properties and transport in a variety of materials. It covers the subject from the early work beginning of the 1990s up to 2006. The topics addressed in the book are the focus of research in all leading semiconductor and optoelectronic device laboratories of the world.
